Thank you for your question Irene.
Thank you for bringing it to my attention @statman and providing the link to that JMP Discovery Summit article. Although outdated(JMP 13), most of the concepts still apply with newer versions of JMP.
Rather than using a journal to create a collection of reports, you might be able to build a Web Report mentioned in that article under the heading "Saving Multiple Reports as Interactive HTML". The result will be an index page with thumbnails that when clicked on launch an interactive HTML version of a report. In JMP 13, this was found under the "View" menu. In JMP 16, the functionality is found under the "File" menu. It is "File > Publish > Publish to File". This will give you the option do select which open reports you would like to include in the collection and whether or not you would like to publish the data in order to make the reports interactive.
If you would rather keep with a Journal-based approach, you may be able to make sure the paths for images are relative paths rather than absolute paths. An absolute path is one that contains the whole path to a file. For example, on Windows, "C:\MyDocuments\MyJMPReports\MyImages". What you want is a path like ".\MyImages" or simply "MyImages" where the main HTML page is created in "C:\MyDocuments\MyJMPReports".
Irene, did you see absolute paths in the html page generated by the JSL? If so, you may be able change the location of the Journal or the location of the html file produced by the JSL so that paths to the images will be relative rather than absolute. Then you should be able to zip up the html and all the subfolders to share this collection of HTML reports with others.
Thanks,
~John